src/corelib/concurrent/qthreadpool.h

   1 /****************************************************************************
   2 **
   3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
   4 ** All rights reserved.
   5 ** Contact: Nokia Corporation (qt-info@nokia.com)
   6 **
   7 ** This file is part of the QtCore module of the Qt Toolkit.
   8 **
   9 ** $QT_BEGIN_LICENSE:LGPL$
  10 ** No Commercial Usage
  11 ** This file contains pre-release code and may not be distributed.
  12 ** You may use this file in accordance with the terms and conditions
  13 ** contained in the Technology Preview License Agreement accompanying
  14 ** this package.
  15 **
  16 ** GNU Lesser General Public License Usage
  17 ** Alternatively, this file may be used under the terms of the GNU Lesser
  18 ** General Public License version 2.1 as published by the Free Software
  19 ** Foundation and appearing in the file LICENSE.LGPL included in the
  20 ** packaging of this file.  Please review the following information to
  21 ** ensure the GNU Lesser General Public License version 2.1 requirements
  22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
  23 **
  24 ** In addition, as a special exception, Nokia gives you certain additional
  25 ** rights.  These rights are described in the Nokia Qt LGPL Exception
  26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
  27 **
  28 ** If you have questions regarding the use of this file, please contact
  29 ** Nokia at qt-info@nokia.com.
  30 **
  31 **
  32 **
  33 **
  34 **
  35 **
  36 **
  37 **
  38 ** $QT_END_LICENSE$
  39 **
  40 ****************************************************************************/
  41
  42 #ifndef QTHREADPOOL_H
  43 #define QTHREADPOOL_H
  44
  45 #include <QtCore/qglobal.h>
  46
  47 #include <QtCore/qthread.h>
  48 #include <QtCore/qrunnable.h>
  49
  50 #ifndef QT_NO_THREAD
  51
  52 QT_BEGIN_HEADER
  53 QT_BEGIN_NAMESPACE
  54
  55 QT_MODULE(Core)
  56
  57 class QThreadPoolPrivate;
  58 class Q_CORE_EXPORT QThreadPool : public QObject
  59 {
  60     Q_OBJECT
  61     Q_DECLARE_PRIVATE(QThreadPool)
  62     Q_PROPERTY(int expiryTimeout READ expiryTimeout WRITE setExpiryTimeout)
  63     Q_PROPERTY(int maxThreadCount READ maxThreadCount WRITE setMaxThreadCount)
  64     Q_PROPERTY(int activeThreadCount READ activeThreadCount)
  65     friend class QFutureInterfaceBase;
  66
  67 public:
  68     QThreadPool(QObject *parent = 0);
  69     ~QThreadPool();
  70
  71     static QThreadPool *globalInstance();
  72
  73     void start(QRunnable *runnable, int priority = 0);
  74     bool tryStart(QRunnable *runnable);
  75
  76     int expiryTimeout() const;
  77     void setExpiryTimeout(int expiryTimeout);
  78
  79     int maxThreadCount() const;
  80     void setMaxThreadCount(int maxThreadCount);
  81
  82     int activeThreadCount() const;
  83
  84     void reserveThread();
  85     void releaseThread();
  86
  87     void waitForDone();
  88 };
  89
  90 QT_END_NAMESPACE
  91 QT_END_HEADER
  92
  93 #endif // QT_NO_THREAD
  94
  95 #endif